prevent building vkh if target already exists in another cmake proj

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d7b90ca57bff1066cfca313b655ae8fd4e0f183f..671622bfeb69441dfa2af4c3f3630fd43f417356 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,7 +31,9 @@ if (VULKAN_SDK)
                SET(ENV{VK_LAYER_PATH} "${VULKAN_SDK}/etc/explicit_layer.d")
 endif ()
 
-add_subdirectory (vkh)
+if (NOT TARGET vkh_static)
+       add_subdirectory (vkh)
+endif()
 
 #SET(ENABLE_VALIDATION OFF CACHE BOOL "Enable vulkan validation layer")